“The first day of the rest of my life.”
“Meeting you was not the first day of the rest of my life; it was the first day of the BEST of my life.”
“Today was the first day of the rest of my life. It was okay, I think the second day of the rest of my life will be better”
“I just don't want to forget this first day of the rest of my life!”
“I thought yesterday was the first day of the rest of my life but it turns out today is.”
“Today is the first day of the rest of your life.”